<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>
<body>
    <div id="app">
        我看：<input type="text" v-model="msg">
        <p>{{msg}}</p>
    </div>
    <script>
        let vm={
            data(){
                return{
                    msg:"you can not up"
                }
                
            }
        }
        Vue.createApp(vm).mount('#app')
    </script>
</body>
</html> 